Mini Microphone CCTV Security Camera Frequency: 20-20KHz S/N ratio: more than 60dB RCA for Audio Output DC Plug for power input Power: DC 12V Center (+) outer (-) 10mA (Max) CONNECT METHOD for Microphone Red line DC head-to-core power ''+'' , outside to power ''-'' extremely. The first white RCA recording devices connected to the audio input or audio amplifier input. Electronically Parameter for Microphone Power supply: DC 6V--12V Current consumption: 10mA Frequency range: 200--10kHz Output Impedance: 600 ohm Output level: 0--6V DC Jack Tip: 5.5 mm (outside dimension)x 2.1 mm (inside dimension) 12 V AC DC POWER SUPPLY ADAPTER 1000mA(1Amp) 12V 1000mA Power Supply (Regulated) For electronic devices, like CCTV security cameras. Regulated output protects your electronic devices from over voltage damages, and increase life of electronic circuits and products you are using with. This Power supply is UL and FCC certified and approved. Perfect for any electronic products... Use it with For Security Cameras, etc. Condition: Brand New in Box. Input: 100 - 240V ~ 50/60 HZ Output: 12V DC 1000 mA Regulation: OK Short Circuit Protection: OK